Excel to CSV Converter
Convert Excel spreadsheets (.xlsx) to CSV format. Free, private, no file stored.
Complete the security check to begin
Excel data in universal format
CSV is the universal format for data exchange. Convert your Excel spreadsheet's active sheet to a clean CSV file that works with any data tool, database, or programming language.
- Universal compatibility - CSV works everywhere
- Data import ready - ideal for databases, Python, R, and SQL
- Clean output - UTF-8 encoded with BOM for Excel compatibility
About Converting XLSX to CSV
XLSX is the modern Microsoft Excel format — a ZIP of XML that stores multiple sheets, formulas, charts and formatting. It is the standard for business spreadsheets. When you need to move away from XLSX, the usual reason is simple: needs spreadsheet software to open.
Converting your XLSX spreadsheet to CSV solves that. CSV is a plain-text table format where each line is a row and commas separate columns. Its simplicity makes it the universal exchange format for data between spreadsheets, databases and code. In practice you gain readable by virtually every tool and tiny, plain-text files. PrivConvert runs the whole XLSX-to-CSV conversion in server memory and deletes your file the instant the CSV is ready — nothing is stored, logged or reused.
When this conversion helps
- You need readable by virtually every tool
- You need tiny, plain-text files
- You need ideal for data import/export
- Sharing a XLSX spreadsheet with someone whose software expects CSV
Tips for best results
- After converting, open the CSV and skim the formatting — complex layouts occasionally need a small touch-up.
- Files up to 250 MB are supported, and you can batch-convert several XLSX files at once; each is processed privately and deleted immediately.
How to Convert XLSX to CSV Online
Converting XLSX files to CSV format is simple with PrivConvert. Our free online converter handles the entire process in your browser with no software installation required. Your files are processed securely in memory and never stored on our servers.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from XLSX to CSV starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
Why Choose PrivConvert?
Unlike other online converters that upload your files to remote servers, store them for days, and may use them for AI training or sell your data, PrivConvert was built with privacy as the foundation. Here's what makes us different:
Files are processed in volatile memory (RAM) and immediately purged. Nothing is ever written to disk or backed up.
All uploads and downloads are encrypted with TLS 1.3. Your files cannot be intercepted in transit.
Use any tool instantly without signing up, providing an email, or creating a profile. No tracking cookies, no user profiling.
Compatible with Windows, macOS, Linux, iOS, and Android. No plugins or desktop software needed - just a modern web browser.
XLSX vs CSV - Format Comparison
| Feature | XLSX | CSV |
|---|---|---|
| File extension | .xlsx | .csv |
| Full name | Office Open XML Spreadsheet | Comma-Separated Values |
| Introduced | 2007 | — |
| Encoding | Binary | Text |
| Editable | Yes | Yes |
| Open standard | Yes | Yes |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
Trusted by Thousands of Users
PrivConvert processes thousands of file conversions every day. Our commitment to privacy and security has made us the go-to choice for professionals, developers, and privacy-conscious users worldwide.